Menghapus label dari tabel
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Menghapus label dari tabel.
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[[["Mudah dipahami","easyToUnderstand","thumb-up"],["Memecahkan masalah saya","solvedMyProblem","thumb-up"],["Lainnya","otherUp","thumb-up"]],[["Sulit dipahami","hardToUnderstand","thumb-down"],["Informasi atau kode contoh salah","incorrectInformationOrSampleCode","thumb-down"],["Informasi/contoh yang saya butuhkan tidak ada","missingTheInformationSamplesINeed","thumb-down"],["Masalah terjemahan","translationIssue","thumb-down"],["Lainnya","otherDown","thumb-down"]],[],[[["\u003cp\u003eThis page provides code samples in Go, Java, Node.js, and Python for removing a specific label from a BigQuery table.\u003c/p\u003e\n"],["\u003cp\u003eThe examples demonstrate how to use the respective BigQuery client libraries to update a table's metadata by setting the label's value to null.\u003c/p\u003e\n"],["\u003cp\u003eEach code sample includes instructions for authentication and setup, referencing the BigQuery quickstart guides and API reference documentation.\u003c/p\u003e\n"],["\u003cp\u003eThe provided code shows how to target specific labels, such as "color", for removal from a BigQuery table.\u003c/p\u003e\n"],["\u003cp\u003eIt highlights the process of updating table metadata through the various supported languages, to remove a specific label.\u003c/p\u003e\n"]]],[],null,["# Delete a label from a table\n\nRemove a label from a table.\n\nExplore further\n---------------\n\n\nFor detailed documentation that includes this code sample, see the following:\n\n- [Deleting labels](/bigquery/docs/deleting-labels)\n\nCode sample\n-----------\n\n### Go\n\n\nBefore trying this sample, follow the Go setup instructions in the\n[BigQuery quickstart using\nclient libraries](/bigquery/docs/quickstarts/quickstart-client-libraries).\n\n\nFor more information, see the\n[BigQuery Go API\nreference documentation](https://godoc.org/cloud.google.com/go/bigquery).\n\n\nTo authenticate to BigQuery, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for client libraries](/bigquery/docs/authentication#client-libs).\n\n import (\n \t\"context\"\n \t\"fmt\"\n\n \t\"cloud.google.com/go/bigquery\"\n )\n\n // deleteTableLabel demonstrates how to remove a specific metadata Label from a BigQuery table.\n func deleteTableLabel(projectID, datasetID, tableID string) error {\n \t// projectID := \"my-project-id\"\n \t// datasetID := \"mydataset\"\n \t// tableID := \"mytable\"\n \tctx := context.Background()\n \tclient, err := bigquery.NewClient(ctx, projectID)\n \tif err != nil {\n \t\treturn fmt.Errorf(\"bigquery.NewClient: %w\", err)\n \t}\n \tdefer client.Close()\n\n \ttbl := client.Dataset(datasetID).Table(tableID)\n \tmeta, err := tbl.Metadata(ctx)\n \tif err != nil {\n \t\treturn err\n \t}\n \tupdate := bigquery.https://cloud.google.com/go/docs/reference/cloud.google.com/go/bigquery/latest/index.html#cloud_google_com_go_bigquery_TableMetadataToUpdate{}\n \tupdate.DeleteLabel(\"color\")\n \tif _, err := tbl.Update(ctx, update, meta.ETag); err != nil {\n \t\treturn err\n \t}\n \treturn nil\n }\n\n### Java\n\n\nBefore trying this sample, follow the Java setup instructions in the\n[BigQuery quickstart using\nclient libraries](/bigquery/docs/quickstarts/quickstart-client-libraries).\n\n\nFor more information, see the\n[BigQuery Java API\nreference documentation](/java/docs/reference/google-cloud-bigquery/latest/overview).\n\n\nTo authenticate to BigQuery, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for client libraries](/bigquery/docs/authentication#client-libs).\n\n import com.google.cloud.bigquery.https://cloud.google.com/java/docs/reference/google-cloud-bigquery/latest/com.google.cloud.bigquery.BigQuery.html;\n import com.google.cloud.bigquery.https://cloud.google.com/java/docs/reference/google-cloud-bigquery/latest/com.google.cloud.bigquery.BigQueryException.html;\n import com.google.cloud.bigquery.https://cloud.google.com/java/docs/reference/google-cloud-bigquery/latest/com.google.cloud.bigquery.BigQueryOptions.html;\n import com.google.cloud.bigquery.https://cloud.google.com/java/docs/reference/google-cloud-biglake/latest/com.google.cloud.bigquery.biglake.v1.Table.html;\n import com.google.cloud.bigquery.https://cloud.google.com/java/docs/reference/google-cloud-bigquery/latest/com.google.cloud.bigquery.TableId.html;\n import java.util.HashMap;\n import java.util.Map;\n\n // Sample tp deletes a label on a table.\n public class DeleteLabelTable {\n\n public static void main(String[] args) {\n // TODO(developer): Replace these variables before running the sample.\n String datasetName = \"MY_DATASET_NAME\";\n String tableName = \"MY_TABLE_NAME\";\n deleteLabelTable(datasetName, tableName);\n }\n\n public static void deleteLabelTable(String datasetName, String tableName) {\n try {\n // Initialize client that will be used to send requests. This client only needs to be created\n // once, and can be reused for multiple requests.\n https://cloud.google.com/java/docs/reference/google-cloud-bigquery/latest/com.google.cloud.bigquery.BigQuery.html bigquery = https://cloud.google.com/java/docs/reference/google-cloud-bigquery/latest/com.google.cloud.bigquery.BigQueryOptions.html.getDefaultInstance().getService();\n\n // This example table starts with existing label { color: 'green' }\n https://cloud.google.com/java/docs/reference/google-cloud-biglake/latest/com.google.cloud.bigquery.biglake.v1.Table.html table = bigquery.https://cloud.google.com/java/docs/reference/google-cloud-bigquery/latest/com.google.cloud.bigquery.BigQuery.html#com_google_cloud_bigquery_BigQuery_getTable_com_google_cloud_bigquery_TableId_com_google_cloud_bigquery_BigQuery_TableOption____(TableId.of(datasetName, tableName));\n // Add label to table\n Map\u003cString, String\u003e labels = new HashMap\u003c\u003e();\n labels.put(\"color\", null);\n\n table.https://cloud.google.com/java/docs/reference/google-cloud-biglake/latest/com.google.cloud.bigquery.biglake.v1.Table.html#com_google_cloud_bigquery_biglake_v1_Table_toBuilder__().setLabels(labels).build().update();\n System.out.println(\"Table label deleted successfully\");\n } catch (https://cloud.google.com/java/docs/reference/google-cloud-bigquery/latest/com.google.cloud.bigquery.BigQueryException.html e) {\n System.out.println(\"Table label was not deleted. \\n\" + e.toString());\n }\n }\n }\n\n### Node.js\n\n\nBefore trying this sample, follow the Node.js setup instructions in the\n[BigQuery quickstart using\nclient libraries](/bigquery/docs/quickstarts/quickstart-client-libraries).\n\n\nFor more information, see the\n[BigQuery Node.js API\nreference documentation](https://googleapis.dev/nodejs/bigquery/latest/index.html).\n\n\nTo authenticate to BigQuery, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for client libraries](/bigquery/docs/authentication#client-libs).\n\n // Import the Google Cloud client library\n const {BigQuery} = require('https://cloud.google.com/nodejs/docs/reference/bigquery/latest/overview.html');\n const bigquery = new https://cloud.google.com/nodejs/docs/reference/bigquery/latest/bigquery/bigquery.html();\n\n async function deleteLabelTable() {\n // Deletes a label from an existing table.\n // This example dataset starts with existing label { color: 'green' }\n\n /**\n * TODO(developer): Uncomment the following lines before running the sample.\n */\n // const datasetId = \"my_dataset\";\n // const tableId = \"my_table\";\n\n const dataset = bigquery.dataset(datasetId);\n const [table] = await dataset.table(tableId).get();\n\n // Retrieve current table metadata\n const [metadata] = await table.getMetadata();\n\n // Add label to table metadata\n metadata.labels = {color: null};\n const [apiResponse] = await table.setMetadata(metadata);\n\n console.log(`${tableId} labels:`);\n console.log(apiResponse.labels);\n }\n\n### Python\n\n\nBefore trying this sample, follow the Python setup instructions in the\n[BigQuery quickstart using\nclient libraries](/bigquery/docs/quickstarts/quickstart-client-libraries).\n\n\nFor more information, see the\n[BigQuery Python API\nreference documentation](/python/docs/reference/bigquery/latest).\n\n\nTo authenticate to BigQuery, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for client libraries](/bigquery/docs/authentication#client-libs).\n\n from google.cloud import https://cloud.google.com/python/docs/reference/bigquery/latest/\n\n client = https://cloud.google.com/python/docs/reference/bigquery/latest/.https://cloud.google.com/python/docs/reference/bigquery/latest/google.cloud.bigquery.client.Client.html()\n\n # TODO(dev): Change table_id to the full name of the table you wish to delete from.\n table_id = \"your-project.your_dataset.your_table_name\"\n # TODO(dev): Change label_key to the name of the label you want to remove.\n label_key = \"color\"\n table = client.https://cloud.google.com/python/docs/reference/bigquery/latest/google.cloud.bigquery.client.Client.html#google_cloud_bigquery_client_Client_get_table(table_id) # API request\n\n # To delete a label from a table, set its value to None\n table.labels[label_key] = None\n\n table = client.https://cloud.google.com/python/docs/reference/bigquery/latest/google.cloud.bigquery.client.Client.html#google_cloud_bigquery_client_Client_update_table(table, [\"labels\"]) # API request\n\n print(f\"Deleted label '{label_key}' from {table_id}.\")\n\nWhat's next\n-----------\n\n\nTo search and filter code samples for other Google Cloud products, see the\n[Google Cloud sample browser](/docs/samples?product=bigquery)."]]